Lub hardness thiab hnav tsis kam ntawm cemented carbide yog siab dua lwm hom pwm

Lub hardness thiab hnav tsis kam ntawm cemented carbide yog siab dua lwm hom pwm, tab sis nws lub zog bending thiab toughness tsis zoo. Cov cemented carbide siv los ua pwm yog tungsten-cobalt. Rau cov pwm uas tsis tshua muaj kev cuam tshuam thiab hnav tsis kam, cemented carbide nrog qis cobalt cov ntsiab lus tuaj yeem xaiv. Rau cov pwm uas muaj kev cuam tshuam siab, cemented carbide nrog cov ntsiab lus cobalt ntau dua tuaj yeem xaiv. Steel-bonded cemented carbide yog tsim los ntawm kev ntxiv me me ntawm cov hmoov hlau alloy (xws li chromium, molybdenum, tungsten, thiab lwm yam) rau hlau hmoov raws li ib tug khi, nrog titanium carbide los yog tungsten carbide raws li cov theem nyuaj, thiab sintering los ntawm hmoov. metallurgy. Lub matrix ntawm steel-bonded cemented carbide yog hlau, uas overcomes lub shortcomings ntawm tsis zoo toughness thiab nyuaj ua ntawm cemented carbide. Nws tuaj yeem raug txiav, welded, forged thiab kho cua sov. Steel-bonded cemented carbide muaj ntau cov carbide. Txawm hais tias nws qhov hardness thiab hnav tsis kam yog qis dua li cov cemented carbide, lawv tseem siab dua lwm cov hlau. Tom qab quenching thiab tempering, lub hardness tuaj yeem ncav cuag 68 ~ 73HRC. Steel-bonded cemented carbide yog cua sov kho tau thiab machinable (mechanical processing) vim nws muaj ntau cov hlau matrix.

Steel-bonded cemented carbide thawj zaug tau tshwm sim hauv Tebchaws Meskas. Xyoo 1955, Goetzer thiab lwm tus tau tsim kev kub ceev steel-bonded cemented carbide; Nyob rau tib lub sijhawm, Lub Tuam Txhab American Chromium tau siv cov txheej txheem yaj infiltration thiab cov kua theem sintering los tsim steel-bonded cemented carbide, thiab muab tso rau hauv kev lag luam nrog cov cim lag luam 26-Tic. Txoj kev loj hlob qeeb hauv xyoo 1970, thiab nws tsis yog txog rau thaum nruab nrab -1980s uas steel-bonded cemented carbide tau rov ua haujlwm dua. Tuam Tshoj tau ua tiav WC-raws li steel-bonded cemented carbide txij li thaum xyoo 1960s, thiab ua tiav WC-based steel-bonded cemented carbide hauv xyoo 1970s. Nyob rau xyoo 1970, cov qub Soviet Union, Tebchaws Meskas, Nyij Pooj, lub tebchaws qub tebchaws Yelemes, Netherlands thiab lwm lub tebchaws txuas ntxiv tshawb fawb thiab tsim cov khoom siv steel-bonded cemented carbide tshiab. Cov theem nyuaj ntawm steel-bonded cemented carbide tau tsim nyob rau hauv ntau yam kev taw qhia. Tsis tas li ntawd, ntau hom tshiab hardness tau tsim; cov hom hlau rau lub sijhawm sib txuas ntawm steel-bonded cemented carbide yog txuas mus ntxiv, xws li ntau yam carbon steels.

Qhov zaus ntawm kev siv cov cemented carbide pwm hauv kev tsim khoom yog siab heev. Cov khoom siv hlau los yog cov hlau tsis yog hlau yog tsim rau hauv cov cuab yeej nrog cov duab tshwj xeeb thiab qhov ntau thiab tsawg los ntawm lub tshuab siab nyob rau hauv qhov kev txiav txim ntawm sab nraud quab yuam. Cov cuab yeej zoo li no hu ua pwm. Cov khoom ua los ntawm cov khoom siv cemented carbide hu ua cemented carbide pwm.